If XZ=8x -18 and RZ = 2x+5, find XR.

Atrucker had a load of grain containing 2 tons. she unloaded 1 ton and 1,200 pounds at the warehouse. how much grain does she still have left on the truck?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.